Cover Page	Jun. 14, 2021
Cover [Abstract]
Entity Registrant Name	NN, Inc.
Document Type	8-K
Document Period End Date	Jun. 14, 2021
Amendment Flag	false
Entity Incorporation, State or Country Code	DE
Entity Central Index Key	0000918541
Entity Tax Identification Number	62-1096725
Entity Address, Address Line One	6210 Ardrey Kell Road, Suite 600
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28277
City Area Code	980
Local Phone Number	264-4300
Entity File Number	000-23486
Trading Symbol	NNBR
Title of 12(b) Security	Common Stock, par value $0.01 per share
Security Exchange Name	NASDAQ
Written Communications	false
Soliciting Material	false
Pre-commencement Tender Offer	false
Pre-commencement Issuer Tender Offer	false
Entity Emerging Growth Company	false